4 large russet potatoes, peeled and cut into 2-inch cubes
2 tablespoons plus 2 teaspoons kosher salt, divided
¼ cup unsalted butter
½ cup sour cream
½ cup heavy whipping cream
1 cup grated Parmesan cheese, divided
2 tablespoons chopped tarragon
4 cloves garlic, minced
1 teaspoon ground black pepper
Garnish: fresh tarragon, ground black pepper, butter
Instructions
Preheat oven to 375˚.
In a large Dutch oven, bring potatoes, water to cover by 2 inches, and 2 tablespoons salt to a boil over medium-high heat. Cook until potatoes are fork-tender, 15 to 20 minutes. Drain potatoes; transfer to a large bowl.
Mash potatoes with a potato masher until desired consistency is reached; stir in butter, sour cream, cream, ½ cup Parmesan, tarragon, garlic, pepper, and remaining 2 teaspoons salt. Spoon potato mixture into a 10-inch cast-iron skillet. Top with remaining ½ cup Parmesan.
Bake until top is lightly browned, 40 to 45 minutes. Garnish with tarragon, pepper, and butter, if desired.
Recipe by Southern Cast Iron at https://southerncastiron.com/garlic-tarragon-mashed-potatoes/